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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e7ea8fb4f889eef27f7f7ba1913aa2d14c32b62322f31746e883236b3c060116' 
  AND token = 'iv8DSklbKl3dqEd2Jfs1JJROR9ys6F2Hqwd6XO/x8FU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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