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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '000179f9937caadd37fe8c798efca66a2bd9ab18ebd961e7eb7a9aa47ab2e5f2' 
  AND token = 'OcLz5ASIb60YQzKnn5dn78EZzhGYEeCQyuwMNFHjw0I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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