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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '1072794d45b4bda31f1dadc34eb1f149a1f4422ca82c0400605f486ac7775ce3' 
  AND token = '5DktOWwSfOiTmpGDe0LQDTgv5T77ShnkKRTh/Dx4PSY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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