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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f69f1e55788dd49a422fb0d73e8c3a62219a7b468eac1300d3cd161bafe8e24f' 
  AND token = '8zFCZoeNlTTcni77DXXCvvNuV+6W2BSNKLNLcekfqic=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

JSON explain

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