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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ddb1891aa6ed2a8e2039d0d20e0d1dad12ebc200eadcc56c3b1956a7f11b2ca3' 
  AND token = 'eh1LPHOHLy1G5xdkMmPms7ZL8K4EOOQMF0i6C5/IJKc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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