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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '098fe03be1ab1c4e6c9f0fca56acf29f04869438dd8ce0aaf0408c3e76ca6116' 
  AND token = 'hV6Y99EsZfiSCK1bewoC1qc1IhwrBOfrH6HNqotf06c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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