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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ea1d20e5ac161adf4b082bf98c380461a62b223264d21ef00563bfe1567dc6f1' 
  AND token = 'Z29MeXgpHgXtJZJHJVecELmlVezYCFaatvSqGp+OJYk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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