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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '174163562bf2093e7d6f78fb8a87022ba8cbb40c3c35e185ed2e66a5e7b27331' 
  AND token = 'QwW2We++/Q+lHaaW2u0b+X9/4bOt87frTdBt70Bkxzw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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