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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '1177480467521adbc85f0ac79d6475f2c6c1cf3ce485502d9f4ecae53c24a818' 
  AND token = 'ROGqscv5BDSBh5ADMXE25QNntYm+nDFj7fmK7h7wDB0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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