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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0cca7ae8f16b75e50d81ac6fa4e63ea4b732a989ab36eba7995a479a609fbf17' 
  AND token = 'SzGH8qIpm5Bcp9hX/w/qF6oBVv9EOWRCzp1NGFsyiBo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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