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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0f2b85da823f52ad19aa8a1e1d98b9577df12eb13f8c5b7ea79544e75263d1fe' 
  AND token = 'Zdxd03BHxqGQK+RoBecuifVMmGhU/T2gASe3vX7PADE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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