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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e2fda924321aececf560999de799b3e611d0023c68fa1886022cfa882d2f7f31' 
  AND token = 'FY6RMdwM2kEUlCAjjvm5l2jJS6f0n5QQ0SypkYC9Q/U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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