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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '10b9e222e27c31f977c437b3a8ade8ef767902a5acdb6304da1f04a299f5e029' 
  AND token = 'Oob1VJOYRdTzpLvTr4HlgS6CvebSUJ0cxFeNvnFetb4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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