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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bd6dcb21078d285f20402a4ae1647405b1fa4e0f1f5cd57d5e23eff9a4e269bb' 
  AND token = 'ncjOjkHovIRB3fTgtqmX1sj4fbR50o6MRRHvTfY8F6k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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