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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bdb6d38664b90215ee5676bdd5a0c30616a7c4ad5be04b0da7316f8d13380db6' 
  AND token = 'wsDeBWIeXo0OYg95UuWF2ysqzxchNGJR0u7DFXJ3hn4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00065

JSON explain

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