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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bc6193dd02e0d0918c7b644b0d6d31527c7286eff20d7afa055b72effcba0966' 
  AND token = 'n0jy1o6WTwsq8SBGXn8rASqQI2Qx2G7b8nsjLI54H8w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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