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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '55584aca2125749a7d0b44c3f4a5e75d6b6dc244d70c8739c3cd4a7db27c0357' 
  AND token = 'a3DPU7t3D61VT98ANYeMW0Hz6SmdMy+hBU/uhQ0bozY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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