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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'dfea2a9354f1e2b4edcbc842df445f5d64a619618a8369819c1f4c0b66dc362c' 
  AND token = 'v5ZcTkKz1gLgKiyJGNVUKtt4Oof4TlmIKkDOo0R9Z3Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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