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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9445387de834d348bffc4cf62e3346960757cc788d263442922fbc6b9f5de8cf' 
  AND token = 'HK74k7sK+k5MD64/WbBU53nxTnBP/Bk+U6Vr597YhFU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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