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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'efa7b5bc8154178ecc5b09ce3b8dc1222cb610e5f469722c2ee083a948b9582a' 
  AND token = 'akqR5I57RAcOgSbV0OwxoL3r3EHhL5wimBl1tlsEgRU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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