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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2722ffa90f199711e017186675d7619ae4fc5410225d8dba1bb1ffb0d70fe66d' 
  AND token = 'tMVv0DGk6pNTmqjNptlP592s9IDbrdboo3NxD1mAZM4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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