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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e30de31cce0befc77c2c298d29c2ef6496ece41052351fd82eeae4e9fb04069c' 
  AND token = '6MfayG7FiALTSAHiQ4IHTp7wHxWboGAdzWz/K9VM76s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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