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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '1675e08af130d40419867c0c344d9d2cc0ac55edf5b6e2bc7b55b764baef4416' 
  AND token = 'w9JNpux2DOZo38tl7EQ0dnAOv6TtYLvea7fqYf9wjHw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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