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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '35b29639d07b7fbd2fee9e49457bb407fb2e75705c5befaf7a4b2a726b869275' 
  AND token = '47RMevP33R4ElQhNHbrXZLoVy4P3irsHTFkb7zdp+Z0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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