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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '027b6670b4651c441bcb354db0d4409909218e8e137eb732bf0dace94fbc6ac6' 
  AND token = 'jgw15qe5jhs7vswFG2Oex2yHc1YEcONV77SdH0gK+5I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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