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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '633fb86fe2b92cf5d99b3bd56017cb3da2616e405d50c7067d9b6d6b5a1792fc' 
  AND token = '/8iyNY+a6ILMGDm57fEmzfW7Ik+s1CdAJMb9un+CyDE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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