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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '179e9110cf062c2f60b32f46146a364ea367bc6ea9127d9130068dcafe8b629d' 
  AND token = 'NJk44mZ1c82awlxX3WNBI1ElwQN4AJDpaXPwuqB0C7E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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