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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '7b0d2c609b1fcda2ad32d4c6aa29a5e7187c95047dd7b2e527600cf8d8126940' 
  AND token = '7EsqTF7Q5f/MSBKLenm68m5/Ou2TpeQGD6O4qcQcrkk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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