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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '28cb1c2cfe4c6625d5f4846f071949030d53ee3b975b3125efafaf8dc4d90896' 
  AND token = '9wOwl3Nc5obWLxgPQ1BHa3YlizoQMA8tsqLccifHo04=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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