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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '62fcbc2a21837eee1ef41a2fbca8ca6bfd423a49ef4e18e14ad3fc1131709a1d' 
  AND token = 'ySLHZOh+MJWG6r5p1gKGfTIKgTqkikjePtxCd1jAMOk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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