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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c05a041612b77848ef61d269c439cbd8044612b1889e29d1768af436ba045e18' 
  AND token = 'FV4Q8M0knfehJROl07S93E0pVB+6/YVsVKald2GEMzE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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