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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd95da140598bc11e9adca716f29915f85e2645ca4babf23899ab3f36314aa8eb' 
  AND token = 'GHh+KzrfcV1c4lxP0xYsZ1YbGna6/TQTIpBi3NqIyXI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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