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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3ee38ce3434d34be02ab55bab819c3bf390b71c193a231e0c6de63dc0c767d13' 
  AND token = 'R2+phoQjrQxAcuQlWCTUjcGcbS0TnRQ+KZ32rteFWTg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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