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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eaa5c8876a85dcc234afe6fe69e495778b494c66c657d06753c7debd0105ba18' 
  AND token = 'P0uCziB40JWNTski/XtkV1gxY5Q0ZLJqOzEBFxIA5Xo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}