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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '69410e7ce41f5dc2b2c738c5088222e7fe75fd31bcd8b5cc20747f0c409b9f08' 
  AND token = 'yosqlda8QtQVoRJPZGpfnX5rZVPBDbXku66boiwZyUE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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