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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e8f692bf41a5a8f3fcaa8c30554cf711c8fef4272898982d5609bae95ee49288' 
  AND token = 'yb67EL+KNBvB+cMeCN1z2FsM4GEMuKXkP5TU9E9ZaxU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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