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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9d19fb0713bc80df3203a90c3d1b0b8289697df4daed0ecc0ac58b1fe3fdf27b' 
  AND token = 'XX7eoVedfrw0EIhc/Pt846CXGlMX5Ca4ofS0HCIi56M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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