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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '95a6f23d40afe869b10e3b84a8a9ddbe5d8ce27e46e391936ee222e3d5e35a38' 
  AND token = 'MJm2k1jqAVqzlKLFmBjvCR5zN95MkgM6p3BFBET+W58=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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