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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c8a5b3a2c7684df2e3ce48e56177ffd4c6998fd7f07a958eca6b052efe6ad58c' 
  AND token = 'A2AkAK9IALEXkxpItsXFS6NnAnN5KTh10ltkzm0nGDk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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