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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '64c6b2e0bfd41c2bda5b684cc5af088041d5e9f6ed0d0b82b645a97452226d6b' 
  AND token = '1KZRU08gL35iHRcg0IiA36tUKNp64Q/kgHQ32MkubaU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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