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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'd21285e02ecc7d6908498efda0799756ff48827a956a6d03148296c87755cc70' 
  AND token = 'rQpImzxtGWl2X7dbP+hzOQ2aa/2aQaL8nby3Z61zu1s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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