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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0b7648c0e7f3d8c61d17b3e037fafd17e2e60f9ee66054d984838645af6dc02d' 
  AND token = 'lsX9m0/GkkXbDRbf58HFiL1EzQm1IuUhQxX/g2EfNxo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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