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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4a01bd3227c4eb2da869890e1677142c591b848eb06d4050fa64acb6349a01de' 
  AND token = 'Z10KtSPc+oBpkDmK1MQHOFKfi6G5QT6gHvA5SexqDTE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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