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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3132c532a5c7fe6a1e48f80e3b02bc2a078bce1f0ff10d4d3bf3ceea5ecf88c5' 
  AND token = 'dTIbCxPNw3OvgWoWokc2WGhagRWHSfjWGKo9CzjbpLA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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