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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fb372f6b00ec667e3a8bacdde9fef9ff325ab108a2cfa44e8b499c06f69eb07e' 
  AND token = 'EVYRUzMVR4W1+uHYPakSUmWKrOOmUXO3Y2jftCDranw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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