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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e7f3097446bdcb4ce0d9696dc572748ddaaeef9966501131c80b7da0825d894a' 
  AND token = 'A/h6sk1GgWDdNeK7rAYkktMn725lJirOAkq+CH1rdJQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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