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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '77da915bda9d0975c3f07c17a9faf0dfdb3faca1b235677ab557a62e9bc69077' 
  AND token = 's6v+iyIz9MxuZ4dRfe89UCIuWYMEEOiyfVE9xRBFWH4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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