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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '717f879f068888f09a578bc4bcb55870de2da110e5ba9ecd4e8ee43251249764' 
  AND token = 'HH0UcR56rIy5sS1O16r3FByaw16IhK0yqY5GCEnF4Aw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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