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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '81109d1729425717937c1b6787a073dfa98ec1a2ee93e158866fa0d54c45b3cf' 
  AND token = 'Ey8+Hayb4TAD9o6WoZiBc0nChVgVNFgyVr8auz4ACLc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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