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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '25830ba35a0b26a8c20886f8707cccfa3fc18ead66174045a8258c0f13fd079a' 
  AND token = 'Pn7oDjS6HzeApnqAQQfkhsT9QPJBB3e4wIyIe5fHwaY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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