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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c13a0c305ab39c74e1168e7d3a82ab0d6d53e4554334a30f4abaf554e2a1bb0d' 
  AND token = 'pyVudfEJUa6xEyzHMucH9GKI5a2R3SnhISQ5o79L93M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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