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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '132e3b81518b5a1d26124b930a4fb13ab2b1296b0d37d2866d8ea066132af5ef' 
  AND token = 'mmaowpKPEey+PMKUdcusjLTkPCJxDfAmWfdnNv+lrx4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00054

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}