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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5d7f12cfa7641724ec52d6513536c03ae428eed8d36fc27ecde79d917a4ce636' 
  AND token = 'xQ67aFF82yOTaXYfktpvuS6p9OZuyt/VOfvGdlX92H8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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