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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '16c5de57ad72038acfe5c2729b021d4d9a8587e0f8f335eb7b801652f0b3791d' 
  AND token = 'OwU4teLLjyKu/RGRz/7Fr6i7P9Fwd5Jf7APDkJKARPk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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